Hermosillo
Sonora, Mexico
Today
Feb 21, 2026
0
/ 100
First Light Index
Poor
Our proprietary metric combining sky clarity, moon interference, and light pollution for optimal stargazing conditions.
0
/ 100
Shutter Score
Excellent
Photography-specific metric factoring cloud quality and golden hour potential for landscape shooters.
Light Windows Today
4 AM12 PM11 PM
Sunrise
6:57 AM
Golden: 47min
Sunset
6:18 PM
Golden: 47min
True Darkness
7:37 PM
Stars visible
Add to Calendar
Get reminders for golden hour and dark sky windows
Morning Golden Hour
6:42 AM - 7:29 AM
Evening Golden Hour
5:45 PM - 6:32 PM
Dark Sky Window
7:37 PM onwards
📱 How to use:
- 1. Download the .ics file above
- 2. Open it with your calendar app (iPhone Calendar, Google Calendar, Outlook)
- 3. Events will be added automatically
- 4. You'll get 30-minute reminders before each window
30-min reminders
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Moon Phase
14%
Phase
Waxing Gibbous
Illumination
14%
💡 Slight Moon Interference
Moon may affect darkest sky observations
Light Pollution
9
Class 1
DarkClass 5
SuburbanClass 9
City
DarkClass 5
SuburbanClass 9
City
Hermosillo Classification
Poor for Astronomy
Bortle Class 9: Inner City Sky
Inner city sky
Visible Tonight
Entire sky brightly lit, only Moon, planets, and brightest stars visible
💡 Urban Sky Recommendation
Focus on lunar and planetary observation. Consider driving to a darker location for deep sky work.
💡 Tip: Check "Nearby Dark Sky" section below to find better observing sites within driving distance
Weather Conditions
Cloud Cover
43%
Moderate cloud cover - potential for dramatic skies
Morning
15%
Evening
43%
Overnight
0%
Precipitation
0%
Very unlikely
Wind
10
km/h avg
Gusts up to 22 km/h
🟡 Breezy - May affect tracking
Humidity
40%
Moderate
Visibility
40.8
km
Excellent clarity
Temperature
28°C
High
/
10°C
Low
Seeing
4
/ 5
Excellent - Atmospheric stability
Transparency
4
/ 5
Very Clear - Air clarity
Conditions Summary
⭐ Premium conditions - Excellent for high-magnification planetary work and deep sky imaging
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